I was more surprised that he didn’t slam it into reverse and back over him.

Theory: So does this mean that LOVE is the key or constant for those in the alternate universe?
Will Kate and her fickle ways put a wrench in the works until she decides on Jack or Sawyer? Her decision could be the answer to who replaces Jacob. Or maybe the candidates are to replace the Man in Black not Jacob.
Maybe it will be Sawyer. The last scene will be of him taking a swig from the wine flask and punching the cork into it thus saving the world by preserving the balance….fade to black…LOST. Maybe Jacob has been looking for not a replacement for himself or the Man in Black but the perfect gray area expert. Each of the candidates have that quality to straddle the line.

Is Desmond now after the shot of electromagnetic energy, the New Jacob, but isn’t quite aware of it? He now seems pretty calm as Jacob was. He is also “running” into the Losties as Jacob had influencing their actions to get them to tap into the LOST universe. I guess he thought Locke needed to be dead in both.

Eloise Hawking seems to be omnipotent regardless of the universe yet as always tight lipped about it. Maybe she is able to travel to or is aware of alternate universes. She’s had Daniel’s journal since she killed him in 77, so it’s possible that she knows how it all works and orchestrated the first detonation to stop herself from killing her son by traveling through time per the Daniels research. Only it didn’t work due to the island’s properties and instead of being able to go back and forth through time maybe she is able to travel to or is aware of alternate universes.
If Eloise can keep all parties from flashing on their island universe everything will be good for her agenda of keeping Daniel alive by keeping the universes from colliding or righting themselves. In an earlier episode she says something to the effect that fate has a way of correcting itself. If you are dead in one you should be dead in the other. The island may move to prevent the universes from colliding. Desmond altered the flight paths of the universes and the island’s path when he set off the the electromagnetic discharge late and causing the 815 crash. Charlie is Desmond’s compass in both universes.

The “man in black” was possibly Kelvin as he was going to use Desmond’s boat to escape the island. Desmond killed Kelvin or “the man in black” in doppelganger form as only Desmond is able to do, he being special and immune to electromagnetism which the smoke monster is clearly an angry cloud of electromagnetic energy, the iron particles giving it form. This is why Evil Locke is so concerned obtaining Desmond and tries to kill him as an act of revenge.

Hall and Oats man

They could be cylons and everything that has happened will happen again. Frak me.